Wearable camera system and recording control method

ABSTRACT

A detector in MCU generates audio data by cutting out a section of the sounds collected by a microphone. A communicator transmits the generated audio data to a back end server. The back end server receives the audio data from a wearable camera. CPU collates the received audio data with audio data registered in an audio database. The communicator notifies the wearable camera of automatic start of the recording in a case where the received audio data and the registered audio data are matched with each other, as a result of collation. In a case of being notified of the instruction to start the recording from the server, the wearable camera starts the recording of a video captured by a capture.

BACKGROUND

Technical Field

The present disclosure relates to a wearable camera system whichcontrols recording of a video captured by a wearable camera and arecording control method.

Description of the Related Art

Recently, in order to efficiently assist police officers with theirservices, a system in which police officers have a wearable cameramounted on a uniform or carry a wearable camera at the time ofpatrolling, for example has been examined.

As a related art using a wearable camera, a wearable monitoring camerasystem disclosed in Japanese Patent Unexamined Publication No.2006-148842 is exemplified. The wearable monitoring camera systemdisclosed in Japanese Patent Unexamined Publication No. 2006-148842 hasa configuration in which an image (video) signal and a sound signal froma CCD camera and a microphone which are wearable, and a date and timeinformation signal from a built-in clock are encoded by an encodingserver which can be accommodated in a wearable pouch, and then the dateand time information which is converted into text information issuperimposed on a captured image so as to record the aforementionedinformation.

Here, a case where the wearable camera disclosed in Japanese PatentUnexamined Publication No. 2006-148842 is used by being mounted on auniform of a police officer is assumed. It is assumed that in the casewhere the police officer has the aforementioned wearable cameradisclosed in Japanese Patent Unexamined Publication No. 2006-148842mounted on his or her uniform, upon finding a monitoring subject such asa suspicious person or a stolen car, the police officer pushes arecording switch so as to start recording image data (an image signal).

However, in the configuration disclosed in Japanese Patent UnexaminedPublication No. 2006-148842, in a case where an incident suddenlyhappens, a police officer is required to promptly take various actionswith respect to the incident in consideration that an initial operationor an initial investigation is important, and if the police officercannot afford to press a recording switch of the wearable camera in asite of an incident and thus forgets to record a video, there may bemissing of the recording as a result. That is, there is a problem inthat it is not possible to remain recording of an evidence video for asite or a suspect involved in an incident in the wearable camera, andthus the video of the incident site cannot be obtained, a districtpolice office cannot take quick and appropriate actions with respect tothe occurrence of the incident, and thereby early resolution of theincident may become difficult. In addition, if the recording of theevidence video cannot be performed, it is not possible to presentsufficient evidence in court afterward, and as a result, there is apossibility of causing a great deal of trouble.

BRIEF SUMMARY

The present disclosure is made in consideration of the above describedcircumstances, and an object thereof is to provide a wearable camerasystem which efficiently assists police officers with their services bystarting recording of a video captured by a wearable camera so as toprevent the recording from missing even if a police officer does notperform a recording operation in person when an incident happens, and amethod of controlling recording.

According to an aspect of the present disclosure, there is provided awearable camera system in which a wearable camera which is mounted on orbelongs to a police officer is connected to a server, in which thewearable camera includes a capture that captures a subject; a recorderthat records a video of the captured subject; a microphone that collectssounds; a detector that generates audio data by cutting out a section ofthe sounds collected by the microphone; and a transmitter that transmitsthe generated audio data to the server, in which the server includes astorage in which a predetermined audio data obtained during patrol orrelating to an incident is registered; a receiver that receives theaudio data transmitted from the wearable camera; a collator thatcollates the received audio data with the predetermined audio dataregistered in the storage; and a notifier that notifies the wearablecamera of an instruction to start recording in a case where the receivedaudio data and the registered predetermined audio data are matched witheach other, as a result of collation, and in which in a case where thenotified of the instruction to start the recording is received from theserver, the wearable camera starts the recording of a video of thesubject captured by the capture.

According to the present disclosure, the wearable camera system iscapable of efficiently assisting police officers with their services bystarting recording of a video captured by a wearable camera so as toprevent the recording from missing even if a police officer does notperform a recording operation in person when an incident happens.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

FIG. 1 is an explanatory diagram illustrating an example of an outlineof a wearable camera system of the exemplary embodiment;

FIG. 2 is a diagram illustrating an example of an upper body of a policeofficer wearing a uniform with a wearable camera of the exemplaryembodiment;

FIG. 3 is a front view illustrating an example of a front-side surfaceof a housing of the wearable camera of the exemplary embodiment;

FIG. 4 is a block diagram illustrating an example of an internalconfiguration of the wearable camera of a first exemplary embodiment;

FIG. 5 is a block diagram illustrating an example of an internalconfiguration of an on-vehicle camera system of the exemplaryembodiment;

FIG. 6 is a block diagram illustrating an example of an internalconfiguration of a back end server of the exemplary embodiment;

FIG. 7 is a sequence diagram illustrating an example of automaticrecording procedure in the wearable camera system of the first exemplaryembodiment;

FIG. 8A is a diagram illustrating a configuration of cut-out data of theexemplary embodiments;

FIG. 8B is a diagram illustrating a configuration of recording dataafter notification of the exemplary embodiments;

FIG. 9 is a block diagram illustrating an example of an internalconfiguration of a wearable camera of a second exemplary embodiment;

FIG. 10 is a sequence diagram illustrating an example of automaticrecording procedure in the wearable camera system of the secondexemplary embodiment;

FIG. 11A is a diagram illustrating automatic recording in Modificationexample 1; and

FIG. 11B is a diagram illustrating automatic recording in Modificationexample 2.

DETAILED DESCRIPTION

Hereinafter, embodiments which specifically disclose a wearable camerasystem and a recording control method will be described in detail byproperly referring to the drawings. Note that, detailed description morethan necessary may be omitted. For example, there may be omitted adetailed description of the already well-known matters and a duplicatedescription of substantially the same structure. This is to avoid thatthe following description is unnecessarily redundant, and to facilitatethe understanding of those skilled in the art. It should be noted thatthe inventors of the present disclosure provide the accompanyingdrawings and the description below so that those skilled in the artfully understand the present disclosure, and do not intend to limit thesubject matter described in the claims by these.

First Embodiment

FIG. 1 is an explanatory diagram illustrating an example of an outlineof wearable camera system 5 of the exemplary embodiments. Wearablecamera system 5 is configured to include on-vehicle camera system (incar video system (ICV)) 30 which is mounted on patrol car 7, wearablecamera 10 which is mounted on a uniform of police officer 3, andin-office system 8 installed in the inside of police office 4.

On-vehicle camera system 30 includes one or more of on-vehicle cameras31, on-vehicle personal computer (PC) 32, and on-vehicle recorder 33,and captures a video based on captured images of an incident happenedwhen police officers patrol by driving patrol car 7 so as to record theincident. One or more of on-vehicle cameras 31 include one or morecameras among a camera which is installed so as to capture the front ofa patrol car 7, and cameras which are respectively installed so as tocapture the left, the right, and the rear of the patrol car. On-vehiclePC 32 controls operations of on-vehicle camera 31 and on-vehiclerecorder 33 in accordance with an instruction operated by police officer3. On-vehicle recorder 33 records video data captured by each on-vehiclecamera 31 in the time series.

On-vehicle camera system 30 is wirelessly connected to back end server(BES) 50 in in-office system 8, selects specific video data from theitems of video data recorded in on-vehicle recorder 33, and is capableof transmitting the selected specific video data to back end server 50.In addition, on-vehicle camera system 30 is communicably connected towearable camera 10, and records the video data captured by wearablecamera 10 and collected audio data in on-vehicle recorder 33. In thefollowing description, it is assumed that the audio data includes soundof gunshot when a pistol which belongs to a suspect or a criminal of theincident is shot during the patrol or in the site of the incident, forexample.

Wearable camera 10 which is mounted on the uniform of police officer 3captures the front of the police officer as a subject, and transmits thecaptured video data and collected audio data to on-vehicle camera system30. Hereinafter, a subject which is supposed to be a capturing target ofwearable camera 10 and on-vehicle camera 31 includes not only a person,but also a scene of a site of an incident, crowds gathering near thesite (so-called, onlookers), and atmosphere around a capturing position.In addition, police officer 3 carries smart phone 40 which is capable ofcommunicating with wearable camera 10. Smart phone 40 has a telephonefunction and a wireless communication function, and is one example of aportable terminal which is generally used to contact with the policeoffice in emergency situations. Wearable camera 10 is connected to backend server 50 via on-vehicle camera system 30, directly, or via smartphone 40 so as to transmit video data and the audio data to back endserver 50. In addition, wearable camera 10 is manually attached tomulti-charging stand 68 described below so as to transmit the video dataand the audio data to back end server 50.

In-office system 8 which is installed in the inside of police office 4includes back end server 50, streaming proxy server (SPS) 65, client PC70, wireless LAN access point 63, multi-charging stand 68, and commandsystem 90.

Back end server 50 manages an evidence video of the incident. Back endserver 50 has a face recognition function of recognizing a face of aframe of an image constituting a video captured by wearable camera 10 oron-vehicle camera 31, and a sound recognition function of recognizingaudio data included in cut-out data (refer to the following description)which is transmitted from wearable camera 10 or on-vehicle camera system30. In addition, back end server 50 includes audio database 58 z (referto FIG. 6) as one example of the storage in which a predetermined audiodata (that is, the audio data of the sound which is likely to begenerated during the patrol or the site of the incident) during thepatrol or relating to the incident is registered. The predeterminedaudio data during the patrol or relating to the incident includes, forexample, the audio data such as a sound of gunshot when the suspect orthe police officer shoots a gun, a sound made by the police officer whois trained in advance to emit when sensing danger during the patrol orwhen the incident happens, and a sound when the police officer fell downon the ground or the like (for example, “with a dull thud”). Back endserver 50 performs the sound recognition of the audio data included incut-out data (refer to the following description) which is transmittedfrom wearable camera 10 or on-vehicle camera system 30, and thencollates the sound obtained by the sound recognition with the soundregistered in audio database 58 z. Note that, storage 58 which storesaudio database 58 z may be installed in the inside or the outside ofpolice office 4 as long as storage 58 is accessible to back end server50.

Streaming proxy server 65 receives the video data which isstreaming-distributed from wearable camera 10, and transfers video datato back end server 50. In addition, streaming proxy server 65 mayreceive the video data which is streaming-distributed from on-vehiclecamera system 30 and transfer the video data to back end server 50.

Client PC 70 includes a browser which accesses suspicious persondatabase (not shown) of back end server 50, and detects information on acriminal or the like of the incident so as to display the detectedresult on a display device (for example, liquid crystal display (LCD)which is previously provided in client PC 70). A person on the wantedlist, an ex-convict, or the like is previously registered bycorresponding to information for identifying incidents (for example,case number) in the suspicious person database. Client PC 70 is capableof accessing audio database 58 z of back end server 50, and searchingthe information on the incident such as the criminal or the like. Notethat, client PC 70 may be installed not only in the inside of policeoffice 4 but also in the outside of the police office 4. Further, clientPC 70 may be any one of a thin client PC and a rich client PC.

Wireless LAN access point 63 is wirelessly connected to on-vehiclecamera system 30 and wearable camera 10, and transmits video data andthe audio data recorded in on-vehicle camera system 30 and the videodata and the audio data recorded in wearable camera 10 to back endserver 50.

Multi-charging stand 68 on which wearable cameras 10 which are mountedon the uniforms of police officers 3 or belongs to police officers 3 canbe mounted has functions of charging the mounted wearable cameras 10 andtransmitting the video data and the audio data stored in wearable camera10 to back end server 50 by performing wire communication with wearablecamera 10. In addition, multi-charging stand 68 is wiredly connected toback end server 50 via a universal serial bus (USB) cable.

Command system 90 is connected to back end server 50, and in a casewhere an incident happens, in accordance with an instruction from backend server 50, command system 90 transmits various dispatch commands tothe patrol car in which the police officer who is supposed to dispatchto the site of the incident such that the police officer rushes to thesite of the incident so as to secure the site and a suspect, and supportthe police officers having arrived at the site. In accordance with theinstruction which is input-operated by the police officer, commandsystem 90 may transfer the command to the police officer who is supposedto dispatch to the site of the incident. In addition, command system 90may not be directly connected to back end server 50, and in a case wherethe incident happens command system 90 may wirelessly transmit variousdispatch commands to the patrol car in which the police officer who issupposed to dispatch to the site of the incident without depending onback end server 50.

In wearable camera system 5, wearable camera 10 is connected toon-vehicle camera system 30 so as to transfer data via near fieldcommunication or by using a signal cable such as USB. The video datacaptured by wearable camera 10 and the collected audio data aretransferred to on-vehicle camera system 30, and played or recorded byon-vehicle camera system 30, and then are transmitted to back end server50.

On-vehicle camera system 30 records the video data captured byon-vehicle camera 31 and the video data and the audio data captured bywearable camera 10 in on-vehicle recorder 33, cut outs the section ofsound collected by wearable camera 10, and transmits the cut-out dataincluding the cut-out sound to back end server 50 via wireless localarea network (LAN).

Similarly, wearable camera 10 can cut out the section of sound collectedby wearable camera 10, and transmit the cut-out data including thecut-out sound to back end server 50 via wireless LAN. In a case where asound having an unexpected large sound volume appears, the cutting outof the sound section is performed so as to include the sound. Note that,the cutting out of the sound section may be performed so as to sample acertain section at a certain cycle. In this case, in the section wherethere the sound having an unexpected large sound volume does not appear,only a sound having a small volume of the surrounding is cut out.

Further, police officer 3 who returns to police office 4 mounts wearablecamera 10 on multi-charging stand 68, and multi-charging stand 68charges wearable camera 10, and can transmit the cut-out data recordedin wearable camera 10 to back end server 50 via a USB cable.

When receiving the cut-out data from the on-vehicle camera system 30 andwearable camera 10, back end server 50 recognizes the sound included inthe cut-out data, collates the recognized sound with the soundregistered in audio database 58 z in which the predetermined audio dataduring the patrol or relating to the incident is registered in advance,and then notifies on-vehicle camera system 30 and wearable camera 10 ofthe result of the collation.

In addition, when police officer 3 requires back end server 50 toperform process of searching the sound involved in the incident byoperating client PC 70, and back end server 50 searches the soundregistered in suspicious audio database 58 z in accordance with therequest of client PC 70.

FIG. 2 is a diagram illustrating an example of an upper body of policeofficer 3 wearing a uniform with wearable camera 10 of the exemplaryembodiments. Wearable camera 10 is placed on a front portion of theuniform of police officer 3 so as to capture the front of police officer3. For example, wearable camera 10 may be fixed on the front portion ina state of hanging on a string from the neck, or may be fixed on thefront portion of the uniform by causing a mounting tool (for example, amounting clip) attached to the rear surface of housing 10 z (refer toFIG. 3) of wearable camera 10 to engage with a mounted tool which isattached on the front portion of the uniform.

FIG. 3 is a front view illustrating an example of a front-side surfaceof housing 10 z of wearable camera 10 of the exemplary embodiment.Recording switch SW1, snapshot switch SW2, and imaging lens 11 z aredisposed on the surface of the front side of housing 10 z. A short pressof recording switch SW1 instructs that the recording is started, and along press (for example, an operation in which pressing state iscontinued for three seconds) of recording switch SW1 instructs that therecording is stopped. Snapshot switch SW2 instructs that a still imagecaptured by capture 11 is recorded whenever being pressed. Imaging lens11 z forms an optical image of a subject to be captured by wearablecamera 10 on an imaging area of capture 11 (refer to FIG. 4).

Communication mode switch SW3 and attribute information imparting switchSW4 are disposed on the side surface of housing 10 z. Three LEDs 26 a,26 b, and 26 c are disposed on the upper surface of housing 10 z. LED 26a displays a state of turning on or off of power of wearable camera 10and a state of battery 25 (refer to FIG. 4). LED 26 b displays a stateof an imaging operation of wearable camera 10. LED 26 c displays a stateof a communication mode of wearable camera 10.

FIG. 4 is a block diagram illustrating an example of an internalconfiguration of wearable camera 10 of a first exemplary embodiment.Wearable camera 10 is provided with capture 11, general purposeinput/output 12 (GPIO), random access memory (RAM) 13, read only memory(ROM) 14, and storage 15. Wearable camera 10 is provided withelectrically erasable programmable rom (EEPROM) 16, real time clock(RTC) 17, and global positioning system (GPS) receiver 18. Wearablecamera 10 is provided with micro controller (MCU) 19, communicator 21,universal serial bus (USB) interface (I/F) 22, Contact terminal 23,power supply 24, and battery 25. Wearable camera 10 is provided withrecording switch SW1, snapshot switch SW2, communication mode switchSW3, and attribute information imparting switch SW4.

Wearable camera 10 is provided with three light emitting diodes (LED) 26a, 26 b, and 26 c, and vibrator 27.

Capture 11 includes imaging lens 11 z (refer to FIG. 3), and asolid-state image sensing element formed of a charge coupled device(CCD) type image sensor or a complementary metal oxide semiconductor(CMOS) type image sensor. Capture 11 outputs the captured video data ofthe subject to MCU 19.

GPIO 12 is a parallel interface. Recording switch SW1, snapshot switchSW2, communication mode switch SW3, attribute information impartingswitch SW4, LEDs 26 a to 26 c, vibrator 27, LCD 28, earphone terminal29C as an example of a sound output terminal, speaker 29B, microphone29A as one example of a sound collector, and gyro sensor JL areconnected to GPIO 12. GPIO 12 inputs and outputs signals between theaforementioned various electronic components and MCU 19. For example,microphone 29A collects ambient sounds of wearable camera 10, andoutputs the collected audio data to MCU 19 via GPIO 12. Microphone 29Amay be a built-in microphone which is accommodated in housing 10 z ofwearable camera 10, or may be a wireless microphone which is wirelesslyconnected to wearable camera 10. In a case of the wireless microphone,the police officers can attach the wireless microphone to any positionof their body, and thus it is possible to enhance the sound collection.

RAM 13 is a work memory which is used to operate, for example, MCU 19.ROM 14 stores program and data in advance so as to control, for example,MCU 19.

Storage 15 as one example of a recorder is formed of a storing mediumsuch as a memory card, and starts recording the video data captured bycapture 11 based on the instruction to automatically start the recording(that is, instruction of recording start). Further, storage 15 includessetting data file 15 z in which information for resolution enhancementis set. For example, in the case where storage 15 is formed of thememory card, storage 15 is removably inserted into the housing 10 z ofwearable camera 10.

EEPROM 16 stores, for example, identification information (for example,a serial number as a camera ID) for identifying wearable camera 10, andvarious types of setting information. RTC 17 counts and outputsinformation on the current time to MCU 19.

GPS receiver 18 receives position information and time information ofcurrent wearable camera 10 (master device) from a GPS transmitter (notshown), and outputs to MCU 19. The time information is also used tocorrect a system time of wearable camera 10. The system time is used torecord a capturing time of the captured image (including a still imageand a video).

MCU 19 serves as a controller of wearable camera 10, for example, andperforms a control process of controlling the entire operations of therespective portions of wearable camera 10, a data input and outputprocess between the respective portions of wearable camera 10, a datacomputing (calculating) process, and a data storing process. MCU 19 isoperated in accordance with the program and data stored in ROM 14. MCU19 acquires the information on the current time from RTC 17 by using RAM13 during the operation, and acquires information on the currentposition from GPS receiver 18.

MCU 19 includes detector 19 z which can be realized by execution of anapplication program, and generates audio data which is obtained bycutting out the section of sound among items of audio data collected bymicrophone 29A by using detector 19 z.

Communicator 21 as one example of a transmitter and a receiver is usedto transmit the audio data generated in detector 19 z to back end server50, and regulates the connection between communicator 21 and MCU 19 in aphysical layer which is a first layer of an open systems interconnection(OSI) reference model. Communicator 21 performs wireless communication(for example, Wi-Fi (trade mark)) by wireless LAN (W-LAN) in accordancewith the aforementioned regulation. Note that, communicator 21 mayperform wireless communication near field communication (NFC) orBluetooth (trade mark).

USB interface 22 is a serial bus, and enables the connection betweenon-vehicle camera system 30 and client PC 70 and the like in the policeoffice.

Contact terminal 23 which is a terminal for electrically connecting to acradle (not shown) or an external adapter (not shown) is connected toMCU 19 via USB interface 22, and is connected to power supply 24.Battery 25 is charged via contact terminal 23, and contact terminal 23enables the communication of the image data or the like.

Contact terminal 23 is provided with “charging terminal V+”, “CON.DETterminal”, “data terminals D− and D+” and “ground terminal” (which arenot shown). The CON.DET terminal is a terminal for detecting voltage andchange of the voltage. Data terminals D− and D+ are terminals fortransferring the images captured by wearable camera 10 to an external PCor the like via a USB connector terminal, for example.

When contact terminal 23 is connected to a connector such as the cradle(not shown) or the external adapter (not shown), the date communicationcan be performed between wearable camera 10 and external device.

For example, power supply 24 supplies electric power supply suppliedfrom the cradle or the external adapter to battery 25 via contactterminal 23 so as to charge battery 25. Battery 25 is formed of, forexample, a chargeable secondary battery, and supplies electric powersupply to the respective portions of the wearable camera 10.

Recording switch SW1 is a pressing button switch for inputting anoperation instruction to start or stop the recording (capturing video)through a pressing operation performed by police officer 3. Whenrecording switch SW1 is pressed odd number of times, the recording(capturing video) is started, and when being pressed even number oftimes, the recording is finished. Further, when recording switch SW1 ispressed twice in succession, as described below, it serves as anemergency button.

Snapshot switch SW2 is a pressing button switch for inputting anoperation instruction to capture a still image through a pressingoperation performed by police officer 3. Whenever snapshot switch SW2 ispressed, the still image is captured at the time of being pressed.

Communication mode switch SW3 is a slide switch for inputting anoperation instruction to set a communication mode between wearablecamera 10 and the external device. The communication mode includes, forexample, an access-point mode, a station mode, and an OFF mode.

The access-point mode is a mode in which wearable camera 10 is operatedas an access point of the wireless LAN, and is wirelessly connected tosmart phone 40 which is belongs to police officer 3 such that thecommunication is performed between wearable camera 10 and smart phone40. In the access-point mode, smart phone 40 is connected to wearablecamera 10, and thus can perform display of the current live image,playback of the recorded image, and display of the captured still imagethrough wearable camera 10.

The station mode is a mode in which the communication is performed withan external device as an access point in a case of connecting to theexternal device by using the wireless LAN. For example, smart phone 40is set as an external device by using a tethering function of smartphone 40. In the station mode, wearable camera 10 can perform, forexample, various settings and transferring (uploading) of the recordedimages kept by wearable camera 10 with respect to on-vehicle camerasystem 30 or client PC 70 or back end server 50 in police office 4.

The OFF mode is a mode in which a communicating operation of thewireless LAN is off, and the wireless LAN is set to be in an unusedstate.

Attribute information imparting switch SW4 is a pressing button switchfor imparting attribute information to the video data.

LED 26 a is a display which displays a power-on state of wearable camera10 (a state of being turned on and off) and a state of battery 25. LED26 b is a display which displays a state of a capturing operation ofwearable camera 10 (a recording state). LED 26 c is a display whichdisplays a state of a communication mode of wearable camera 10. Inaddition, when wearable camera 10 receives notification data from backend server 50, three LEDs 26 a to 26 c perform a flashing operation inaccordance with the instruction from MCU 19. At this time, MCU 19changes flashing patterns of LEDs 26 a to 26 c in accordance with thelevels of importance of the information on the person included in thenotification data.

Gyro sensor JL detects an angular velocity (that is, rotation angle perunit time) of wearable camera 10 and detects that police officer 3 whohas wearable camera 10 mounted on the uniform or carries wearable camera10 is fell down (Man Down), for example. The detection result of Gyrosensor JL is input to MCU 19 via GPIO 12. Wearable camera 10 canaccurately detect behavior of police officer 3 who has wearable camera10 mounted on the uniform or carries wearable camera 10, such asrotations (for example, fell down on the ground, fell down on the groundby being shot by the pistol, and fell down on the ground by beingattacked by a deadly weapon) by using gyro sensor JL.

MCU 19 performs the input and detection of each of recording switch SW1,snapshot switch SW2, communication mode switch SW3, and attributeinformation imparting switch SW4, and performs processing with respectto the operated switch input.

In a case where the operated input of recording switch SW1 is detected,MCU 19 controls the start or the stop of the imaging operation incapture 11, and stores the image obtained from capture 11 as a video instorage 15.

In a case where the operated input of snapshot switch SW2 is detected,MCU 19 stores the image captured by capture 11 when snapshot switch SW2is operated as a still image in storage 15.

MCU 19 detects the state of communication mode switch SW3, and operatescommunicator 21 by the communication mode in accordance with the settingof communication mode switch SW3.

In a case where attribute information imparting switch SW4 is pressed,MCU 19 imparts the attribute information to the cut-out data includingthe face image which is cut out from the image captured by capture 11.

FIG. 5 is a block diagram illustrating an example of an internalconfiguration of on-vehicle camera system 30 of the exemplaryembodiments. On-vehicle camera system 30 is configured to includeon-vehicle camera 31, on-vehicle recorder 33, and on-vehicle PC 32.

On-vehicle recorder 33 is configured to include CPU 101, communicator102, flash ROM 104, RAM 105, microcomputer 106, GPS receiver 107, GPIO108, button 109, LED 110, and storage 111.

CPU 101 performs a control process of controlling the entire operationsof the respective portions of on-vehicle recorder 33, a data input andoutput process between the respective portions, a data computing(calculating) process, and a data storing process. CPU 101 is operatedin accordance with the program and data stored in flash ROM 104.

Communicator 102 wirelessly communicates with an external device via awireless line or a wired line. Examples of the wireless communicationinclude wireless local area network (LAN) communication, near fieldcommunication (NFC), and Bluetooth (trade mark). The wireless LANcommunication is performed in accordance with IEEE802.11n regulation ofWi-Fi (trade mark). CPU 101 and communicator 102 are connected to eachother via a peripheral component interconnect (PCI) or a USB interface.Wire communication includes wire LAN communication.

Communicator 102 performs the wire communication between on-vehiclecamera 31 and on-vehicle PC 32, for example. Communicator 102 performsthe wireless communication between wearable camera 10 and client PC 70and back end server 50 of police office 4. FIG. 5 illustrates an examplein which on-vehicle recorder 33 is wiredly connected to on-vehiclecamera 31 and on-vehicle PC 32 via communicator 102, and is wirelesslyconnected to wearable camera 10.

Flash ROM 104 is a memory which stores program and data for controlling,for example, CPU 101. In addition, various types of setting informationare stored in flash ROM 104.

RAM 105 is a work memory which is used in the operation of CPU 101. Aplurality of RAMs 105 are provided.

Microcomputer 106 which is one type of a microcomputer is connected tothe respective portions (for example, GPS receiver 107, GPIO 108, button109, and LED 110) relating to the external interface, and performs thecontrol relating to the external interface. Microcomputer 106 isconnected to CPU 101 via a universal asynchronous receiver transmitter(UART), for example.

GPS receiver 107 receives the information of the current position ofon-vehicle recorder 33 and time information from the GPS transmitter(not shown) and outputs to CPU 101. The time information is used tocorrect the system time of on-vehicle recorder 33.

GPIO 108 is, for example, a parallel interface, and inputs and outputssignals between the connected external device (not shown) and MCU 19 viaGPIO 108. Various sensors (for example, a speed sensor, an accelerationsensor, and a door opening and closing sensor) are connected to GPIO108.

Button 109 includes a recording button for starting or stopping therecording of the image captured by on-vehicle camera 31. Button 109 isnot limited to a button type but may be a switch type as long as it ispossible to switch states in various ways.

LED 110 displays a power-on state of on-vehicle recorder 33 (a state ofbeing turned on and off), a recording state, a connection state ofon-vehicle recorder 33 to LAN, and a usage state of LAN connected toon-vehicle recorder 33, by turning the light on or off, and flashing thelight.

Storage 111 is a storage device such as SSD and HDD, and stores theimage (video) data recorded and captured by on-vehicle camera 31.Storage 111 may store the video which is recorded and captured, and theaudio data which is collected and recorded by wearable camera 10.Further, storage 111 may store data audio data of the sounds collectedby on-vehicle camera 31 in a case where on-vehicle camera 31 collectsthe sounds. Storage 111 is connected to CPU 101 via serial ATA (SATA). Aplurality of storages 111 may be provided.

On-vehicle PC 32 is configured to include CPU 201, input/output (I/O)controller 202, communicator 203, memory 204, input 205, display 206,speaker 207, and HDD 208.

On-vehicle PC 32 can communicate with each of wearable camera 10 andon-vehicle recorder 33, and also communicate with each of back endserver 50 and client PC 70 of in-office system 8.

CPU 201 performs a control process of controlling the entire operationsof the respective portions of on-vehicle PC 32, a data input and outputprocess between the respective portions via I/O controller 202, a datacomputing (calculating) process, and a data storing process. CPU 201 isoperated in accordance with the program and data stored in memory 204.

I/O controller 202 performs control relating to the input and output ofdata between CPU 201 and the respective portions (for example,communicator 203, input 205, display 206, speaker 207, and HDD 208) ofon-vehicle PC 32, and performs relay of the data from CPU 201 and datato CPU 201. Note that, I/O controller 202 may be integrally formed withCPU 201.

Communicator 203 wiredly or wirelessly communicates with on-vehiclerecorder 33, wearable camera 10 which is mountable on the uniform ofpolice officer 3, or in-office system 8 side.

Memory 204 which is formed of, for example, RAM, ROM, and nonvolatile orvolatile semiconductor memory serves as a work memory during theoperation of CPU 201, and stores a predetermined program and data so asto operate CPU 201.

Input 205 is UI which receives and notifies an input operation of policeofficer 3 to CPU 201 via I/O controller 202, and is a pointing devicesuch as a mouse and keyboard. Input 205 which is correspondinglydisposed on the screen of display 206 may be formed of a touch panel ora touch pad which can be operated by a finger of police officer 3 or astylus pen.

Display 206 is formed by using, for example, liquid crystal display(LCD) and organic electroluminescence (EL), and displays various typesof information. In addition, display 206 displays an image on the screenunder the instruction of CPU 201 in a case where the image which iscaptured (recorded) by wearable camera 10 is input in accordance withthe input operation by police officer 3, for example.

Speaker 207 outputs the sound included in data under the instruction ofCPU 201 in a case where the data including the video which is captured(recorded), and the sound which is collected by wearable camera 10 isinput in accordance with the input operation by police officer 3, forexample. Display 206 and speaker 207 may be separately formed fromon-vehicle PC 32.

HDD 208 stores, for example, various types of data, and software (asoftware program). Specifically, HDD 208 stores, for example, softwarefor performing control or setting of on-vehicle recorder 33, andsoftware for performing control or setting of wearable camera 10. Inaddition, HDD 208 stores, for example, the image which is transferredfrom wearable camera 10, and captured by wearable camera 10.

FIG. 6 is a block diagram illustrating an example of an internalconfiguration of back end server 50 of the exemplary embodiments. Backend server 50 is provided with CPU 51, I/O controller 52, communicator53, memory 54, input 55, display 56, speaker 59, storage controller 57,and storage 58.

CPU 51 performs a control process of controlling the entire operationsof the respective portions of back end server 50, a data input andoutput process between the respective portions, a data computing(calculating) process, and a data storing process. CPU 51 is operated inaccordance with the program and data stored in memory 54.

CPU 51 includes recognizer 51 z as one example of a collator which canbe realized by execution of an application program, and performscollation of sounds. Recognizer 51 z analyzes the input audio data,extracts the features, and collates the extracted features with thefeatures of the audio data registered in audio database 58 z so as todetermine whether or not the items of audio data are matched with eachother. Note that, the sound recognition process is a well-knowntechnique, and thus the details of the process of recognizer 51 z willnot be described.

I/O controller 52 performs control relating to the input and output ofdata between CPU 51 and the respective portions (for example,communicator 53, input 55, display 56, and storage controller 57) ofback end server 50, and performs relay of the data from CPU 51 and datato CPU 51. Note that, I/O controller 52 may be integrally formed withCPU 51.

Communicator 53 wiredly or wirelessly communicates with on-vehiclerecorder 33, on-vehicle PC 32, smart phone 40, wearable camera 10 whichis mountable on the uniform of police officer 3, or client PC 70.

Memory 54 which is formed of, for example, RAM, ROM, and nonvolatile orvolatile semiconductor memory serves as a work memory during theoperation of CPU 51, and stores a predetermined program and data so asto operate CPU 51.

Input 55 is UI which receives an input operation of police officer 3 ora person in charge in police office 4, and notifies CPU 51 of the inputoperation via I/O controller 52, and is a pointing device such as amouse and keyboard. Input 55 which is correspondingly disposed on thescreen of display 56 may be formed of a touch panel or a touch pad whichcan be operated by a finger of police officer 3 or the person in chargeor a stylus pen.

Display 56 is formed by using, for example, LCD and organic EL, anddisplays various types of information. Display 56 displays a video onthe screen under the instruction of CPU 51 in a case where the videowhich is captured or recorded by wearable camera 10 is input inaccordance with the input operation by police officer 3 or the person incharge, for example. Display 56 displays a video on the screen under theinstruction of CPU 51 in a case where the video which is captured orrecorded by on-vehicle camera 31 is input in accordance with the inputoperation by police officer 3 or the person in charge, for example.

Speaker 59 outputs the sound under the instruction of CPU 51 in a casewhere the sound collected by wearable camera 10 is input in accordancewith the input by police officer 3 or the person in charge, for example.

Storage controller 57 performs the control relating to storage 58.

Storage 58 is a storage device such as SSD and HDD, and stores theimages recorded and captured by wearable camera 10 and on-vehicle camera31. In addition, storage 58 may store data other than image (forexample, audio data collected by wearable camera 10 and on-vehiclecamera 31). Storage 58 is connected to CPU 51 via serial ATA (SATA).

Storage 58 stores audio database 58 z. The predetermined audio datawhich is assumed to be emitted during the patrol or when the incidenthappens and notification information (for example, information on asound source) corresponding to the audio data are registered in audiodatabase 58 z as one example of the storage. As the audio data, a soundof gunshot when the suspect or the police officer shoots a gun, a soundmade by the police officer who is trained in advance to emit whensensing danger during the patrol or when the incident happens, and asound when the police officer is fell down on the ground or the like areregistered. Further, the input sound may include, for example, the voiceof the criminal such as “put your hands up”. The information on thesound source includes, for example, the name and performance of thepistol in a case of the sound of the gunshot.

An operation of wearable camera system 5 having the above-describedconfiguration will be described. Here, an operation of automaticallystarting recording will be described by assuming a case where policeofficer 3 is in a hurry or has his or her hands full, and thus cannotpress recording switch SW1 of wearable camera 10 when the incidenthappens.

FIG. 7 is a sequence diagram illustrating an example of automaticrecording procedure in wearable camera system 5 of the first exemplaryembodiment. Here, the police officers are distinguished as an individualperson such that police officer 3 who is in patrol is set to be policeofficer A, police officer 3 who has rushed to the site in response to adispatch instruction is set to be police officer B, and police officer 3who has received an additional dispatch instruction is set to be policeofficer C.

Wearable camera 10 continuously captures images or collects the soundsthe vicinity while police officer A having a wearable camera 10 mountedon a uniform or carrying a wearable camera 10 gets off from patrol car7, and patrols around the area. Detector 19 z in MCU 19 detects thesounds collected by microphone 29A, and then generates audio data bycutting out a section of the detected sound (T1).

FIG. 8A is a diagram illustrating a configuration example of cut-outdata D1. Cut-out data D1 includes detection data fd1 and metadata md1.Detection data fd1 includes the audio data obtained by cutting out thesection of the sound among audio signal waveforms obtained by collectingsounds by microphone 29A. Metadata md1 includes the position information(GPS information) obtained by GPS receiver 18. Metadata md1 also mayinclude information on the current date and time measured by RTC 17.

MCU 19 transmits the cut-out data to back end server 50 via communicator21 (T2).

In back end server 50, communicator 53 receives the cut-out datatransmitted from wearable camera 10. CPU 51 recognizes the sound (forexample, gunshot) from the audio data included in the cut-out data byrecognizer 51 z (T3). CPU 51 searches audio database 58 z stored instorage 58 based on the recognized sound, and determines whether or notthe recognized sound corresponds to the sound (gunshot) registered inaudio database 58 z (T4). Here, the sound of gunshot is exemplified asone example of the corresponding sound; however, examples of thecorresponding sound may include the input sound, the sound when thepolice officer is fell down, the impact sound, and an explosion sound.

In a case where the recognized sound corresponds to the sound registeredin audio database 58 z, CPU 51 regards this as a trigger of the start ofrecording, and notifies wearable camera 10 of the automatic start of therecording (that is, instruction to start the recording) via communicator53 as one example of a notifier (T5). The notification includesnotification information. The notification information includes, forexample, information on the sound source (name and performance of thesound source) such as the sound of the gunshot and the explosion soundin addition to the aforementioned instruction to start the recording.

When wearable camera 10 receives the notification data of the automaticstart of the recording from back end server 50 via communicator 21, MCU19 starts the automatic recording as a process after notification (T6).Capture 11 constantly captures videos while the power of wearable camera10 is turned on. MCU 19 stores the video captured by capture 11 instorage 15 when the automatic recording is started.

When receive the notification data, MCU 19 may start streamingdistribution in which the video data of a video captured by capture 11is transmitted to back end server 50 via streaming proxy server 65. Backend server 50 displays the video captured by wearable camera 10 on thescreen of display 56 in real-time.

In procedure T4, in a case of an emergency situation, for example, acase where multiple sounds of the gunshot are recognized, a case wherethe explosion sound is recognized in addition to the sound of thegunshot, and a case where the sound when the police officer is fell downis recognized, wearable camera system 5 performs the operations inprocedures T5 and T6 as described above, and additionally performs thefollowing operations.

Back end server 50 determines the additional dispatch in accordance withthe instruction of police officer 3 in police office 4 (T7). Back endserver 50 requests for the dispatch from command system 90 based on theposition information included in the metadata transmitted from wearablecamera 10 (T8). When receiving the request of the dispatch from back endserver 50, command system 90 instructs police officer C to be dispatched(T9). Police officer C rushes to the site of the incident when receivingthe instruction of the dispatch.

Back end server 50 determines automatic recording of wearable camera 10in the vicinity of the site so as to obtain the video in which thevicinity of the site (T10), and notifies wearable camera 10 belonging topolice officer B in the vicinity of the site of the automatic recording(T11). When wearable camera 10 which is mounted on the uniform of policeofficer B receives the aforementioned notification, MCU 19 starts theoperation of recording the video captured by capture 11 and the soundcollected by microphone 29A in storage 15 (T12). FIG. 8B is a diagramillustrating a configuration of recording data D2 after notification.Recording data D2 after notification includes video data fd2 andmetadata md2 corresponding to video data fd2. Metadata md2 includes theGPS position information and notification information (the informationon the sound source).

Wearable camera 10 performs the recording from before a predeterminedtime (for example, ten minutes) for receiving the notification data.That is, the video captured by the wearable camera 10 is recorded so asto be repeatedly overwritten in a buffer memory of RAM 13 for apredetermined period of time. When receiving the notification datatransmitted from back end server 50, wearable camera 10 uses the videodata before being stored in the buffer memory for the predeterminedperiod of time as an initial part of the recording data afternotification. With this, wearable camera 10 can reliably record thevideo before and after situations in which the sound of the gunshot isgenerated, and the video can be more valuable as an evidence video inwhich a person who shoots a gun is captured. The predetermined time isoptionally set by the operation of police officer 3.

In procedure T4, in a case where the recognized sound does notcorrespond to the sound registered in audio database 58 z, wearablecamera 10 does not perform any operation (T13).

As described above, wearable camera system 5 in the first exemplaryembodiment, detector 19 z in MCU 19 of wearable camera 10 cuts out thesection of the sounds collected by microphone 29A so as to generate theaudio data. Communicator 21 transmits the generated audio data to backend server 50. Back end server 50 receives the audio data from wearablecamera 10. CPU 51 collates the received audio data with the audio dataregistered in audio database 58 z. As the result of the collation, in acase where the received audio data and the registered audio data arematched with each other, communicator 53 notifies wearable camera 10 ofthe automatic start of the recording. In a case where wearable camera 10is notified of the automatic start of the recording, the recording ofthe video captured by capture 11 is started.

With this, when the incident happens, wearable camera system 5 canstarts the recording the video captured by wearable camera 10 withoutthe operation performed by the police officer. Accordingly, even in acase where the police officer who is in a hurry to correspond to theoccurrence of the incident cannot afford to press the recoding switch ofwearable camera 10, or forgets to press the recoding switch due to asudden situation, it is possible to obtain the video capturing the siteof the incident, and prevents the recording from being missed.Therefore, wearable camera system 5 can obtain the video of the incidentsite, and thus efficiently assist police officers with their servicessuch that the district police office can take quick and appropriateactions for the occurrence of the incident. In addition, the video ofthe incident site remains as the evidence video, a smooth operation isexpected in resolution of the incident, a trial, or the like.

Since the sounds collected by microphone 29A of wearable camera 10 isthe sound of the gunshot, it is possible to record the video of the sitein which a shoot incident happens.

Second Exemplary Embodiment

In the first exemplary embodiment, the case where the wearable camera isusually connected to the back end server of the police office via thenetwork is described; however, in the second exemplary embodiment, acase where the wearable camera is not connected to the network ingeneral will be described. In this case, a police officer in the outsideof the police office and a police officer in the police office make acall using a radio wave.

The wearable camera system in the second exemplary embodiment has almostthe same configuration as that of the first exemplary embodiment. Thesame components as those in the first exemplary embodiment are denotedby the same reference numerals, and thus the description thereof will beomitted.

FIG. 9 is a block diagram illustrating an example of an internalconfiguration of wearable camera 10A of the second exemplary embodiment.In wearable camera 10A, storage 15 includes audio database 15 y in whichthe predetermined audio data during the patrol or relating to theincident is registered, which is the same as audio database 58 z in thefirst exemplary embodiment. Similar to the first exemplary embodiment,the predetermined audio data includes the audio data such as the soundof the gunshot, the input sound, and the sound when the police officeris fell down on the ground or the like (for example, “with a dullthud”).

MCU 19 includes recognizer 19 y which can be realized by execution of anapplication program, and performs collation of sounds based on the audiodata generated by detector 19 z. Recognizer 19 y analyzes the inputaudio data, extracts the features, and collates the extracted featureswith the features of the audio data registered in audio database 15 y soas to determine whether or not the items of audio data are matched witheach other.

MCU 19 includes authenticator 19 x which can be realized by execution ofan application program, and authenticates police officer 3.Authenticator 19 x registers authentication data of police officer 3carrying wearable camera 10 in storage 15 in advance, and in a casewhere the input data and the authentication data are matched with eachother, allows police officer 3 to use wearable camera 10. On the otherhand, in a case where the input data and the authentication data are notmatched with each other, authenticator 19 x does not allow policeofficer 3 to use wearable camera 10.

Examples of the authentication data include an identification code ofpolice officer 3, and when police officer 3 logs in wearable camera 10,authentication is performed. Further, iris data, input audio data, orface recognition data of police officer 3, or combination thereof may beused as the authentication data, and when police officer 3 logs inwearable camera 10, the authentication is performed. When theauthentication of the police officer is performed, the police officerand the wearable camera are linked with each other. Accordingly, otherscannot use the wearable camera. As such, it is possible to simplyauthenticate the police officer by only using the wearable camera, theconvenience is enhanced.

FIG. 10 is a sequence diagram illustrating an example of automaticrecording procedure in wearable camera system 5 of the second exemplaryembodiment. Wearable camera 10 continuously captures images or collectsthe sounds the vicinity while police officer A gets off from patrol car7, and patrols around the area. Detector 19 z in MCU 19 detects thesound collected by microphone 29A, and then generates audio data bycutting out a section of the detected sound. Further, recognizer 19 y inMCU 19 recognizes a sound (for example, a sound of gunshot) from thegenerated audio data (T21).

MCU 19 searches audio database 15 y based on the recognized sound, anddetermines whether or not the recognized sound corresponds to the sound(gunshot) registered in audio database 15 y. Here, the sound of gunshotis exemplified as one example of the corresponding sound; however,examples of the corresponding sound may include the input sound, thesound when the police officer is fell down, and an explosion sound.

In a case where the recognized sound corresponds to the sound registeredin audio database 15 y, MCU19 starts the automatic start of therecording of wearable camera 10 (T22). In addition, when the automaticrecording is started, MCU 19 is connected to the wireless network viacommunicator 21 so as to realize the wireless communication with backend server 50. A method of connecting to the wireless network is thesame as that in the first exemplary embodiment. On the other hand, in acase where the recognized sound does not correspond to the soundregistered in audio database 15 y, MCU 19 does not perform anyoperation.

During the recording, when the sounds are collected by microphone 29A,and the audio data is generated by detector 19 z (T23), MCU 19 transmitsthe generated audio data to back end server 50 via communicator 21(T24). Note that, in an emergency case, instead of transmitting theaudio data, emergency information may be transmitted by pressing anemergency button so as to clearly notify the emergency case. Theemergency button may be separately disposed in the housing of thewearable camera; however, in the exemplary embodiment, the emergencycase can be informed by pressing recording switch SW1 twice insuccession.

CPU 51 searches audio database 58 z stored in storage 58 based on thereceived sound, and determines whether or not the recognized soundcorresponds to the sound of the emergency situation registered in audiodatabase 58 z (T25). Here, examples of the sound of the emergencysituation include the sound of the gunshot; however, examples of thecorresponding sound may include the input sound, the sound when thepolice officer is fell down, and an explosion sound, and may furtherinclude multiple sounds of the gunshot or the explosion sound with thesound of the gunshot which is determined as a case of an emergencysituation. In a case where the emergency button is pressed, CUP 51 isrequired to determine that the emergency situation has occurred.

In a case where the recognized sound corresponds to the sound registeredin audio database 58 z, CPU 51 notifies wearable camera 10 of theautomatic start of streaming via communicator 53 as one example of anotifier (T26).

When wearable camera 10 receives the notification data of the automaticstart of the streaming from back end server 50 via communicator 21, MCU19 starts the automatic start of the streaming as a process afternotification (T27). Here, MCU 19 performs streaming distribution of thevideo data to back end server 50 via streaming proxy server 65 whilerecording the video data of the video captured by capture 11 in storage15. With this, back end server 50 displays the video captured bywearable camera 10 on the screen of display 56 in real-time.

In procedure T25, in a case of an emergency situation, for example, acase where multiple sounds of the gunshot are recognized, a case wherethe explosion sound is recognized in addition to the sound of thegunshot, and a case where the sound when the police officer is fell downis followed by the sound of the gunshot, wearable camera system 5performs the operations in procedures T26 and T27 as described above,and additionally performs the following operations, similar to the firstexemplary embodiment.

Back end server 50 determines the additional dispatch in accordance withthe instruction of police officer 3 in police office 4 (T28). Back endserver 50 requests for the dispatch from command system 90 based on theposition information included in the metadata transmitted from wearablecamera 10 (T29). When receiving the request of the dispatch from backend server 50, command system 90 instructs police officer C to bedispatched (T20). Police officer C rushes to the site of the incidentwhen receiving the instruction of the dispatch.

Back end server 50 determines automatic recording of wearable camera 10in the vicinity of the site so as to obtain the video in which thevicinity of the site (T31), and notifies wearable camera 10 belonging topolice officer B in the vicinity of the site of the automatic recording(T32). When wearable camera 10 which is mounted on the uniform of policeofficer B receives the aforementioned notification, MCU 19 starts theoperation of recording the video captured by capture 11 and the soundcollected by microphone 29A in storage 15 (T33).

In procedure T25, in a case where the recognized sound does notcorrespond to the sound registered in audio database 58 z, wearablecamera 10 does not perform any operation (T34).

As described above, wearable camera system 5 in the second exemplaryembodiment, audio database 58 z registers the audio data of the soundsemitted in the emergency situation as the predetermined audio data. In acase where the audio data received from wearable camera 10 and theregistered audio data are matched with each other, back end server 50instructs wearable camera 10 to perform the streaming distribution ofthe video captured by capture 11. Wearable camera 10 starts thestreaming distribution of the video captured by capture 11 in accordancewith an instruction from back end server 50.

With this, in wearable camera system 5, in the case where the sound ofthe emergency situation is emitted, the police officer in the policeoffice grasps the situation of the incident site by watching the videocaptured by the wearable camera, and thus can take appropriate actions.

Wearable camera 10 transmits the emergency information to back endserver 50 in a case where recording switch SW1 is pressed twice insuccession as an emergency button which is operated in the emergencysituation. Back end server 50 instructs wearable camera 10 to performthe streaming distribution of the video captured by capture 11 when theemergency information is received from wearable camera 10. Wearablecamera 10 starts distribution of the video captured by capture 11 inaccordance with an instruction from back end server 50.

With this, it is possible to clearly notify the emergency case. Inaddition, when the police officer presses the emergency button inperson, it is possible to reflect intention of the police officer. Thepolice officer in the police office can grasp the situation of theincident site by watching the video captured by the wearable camera, andthus can take an appropriate action.

Modification Example 1 of First Exemplary Embodiment

In the first exemplary embodiment, back end server 50 notifies wearablecamera 10 of the automatic start of the recording, and when receivingthis notification data, wearable camera 10 starts the automaticrecording; however, in Modification example 1 of the first exemplaryembodiment (hereinafter, referred to as Modification example 1), commandsystem 90 notifies wearable camera 10 of the automatic start of therecording.

FIG. 11A is a diagram illustrating automatic recording in Modificationexample 1. Wearable camera 10 is connected to a mobile line, and canrealize mobile communication with respect to command system 90. Commandsystem 90 receives GPS information of wearable camera 10 via the mobilecommunication. In a case where a serious incident happens in thevicinity, command system 90 notifies wearable camera 10 of the automaticstart of the recording, based on the GPS information (T41). Further, ina case where the occurrence of a serious incident is notified, commandsystem 90 notifies wearable camera 10 of the automatic start of therecording even in a case where a serious criminal's face is alreadyrecognized. When receiving the notification of the automatic start ofthe recording, wearable camera 10 starts the automatic recording (T42).

Note that, when back end server 50 receives the emergency informationfrom wearable camera 10, and notifies command system 90 of the emergencyinformation, command system 90 may notify wearable camera 10 of theautomatic start of the recording.

Modification Example 2 of First Exemplary Embodiment

Modification example 2 of the first exemplary embodiment (hereinafter,referred to as Modification example 2) describes a case where commandsystem 90 notifies wearable camera 10 of the automatic start of therecording via an on-vehicle PC, a tablet, or a smart phone (hereinafter,referred to as a mobile terminal) which is belongs to the policeofficer. Note that, command system 90 may notify on-vehicle PC 32 ofon-vehicle camera system 30 of the automatic start of the recording inaddition to the aforementioned mobile terminal such as the tablet andthe smart phone. In this case, on-vehicle PC 32 can instruct wearablecamera 10 to perform the automatic start of the recording.

FIG. 11B is a diagram illustrating automatic recording in Modificationexample 2. Wearable camera 10 can communicate with the mobile terminal.This type of communication is performed via a USB cable, Bluetooth(trade mark), near field communication, or the like.

In a case of an emergency call (110), command system 90 determines aninstruction the police officer in the vicinity to rush to the site(T51), and transmits the instruction to the mobile terminal such thatthe police officer rushes to the site (T52). In a case of receiving theinstruction from command system 90 such that the police officer rushesto the site, the mobile terminal notifies wearable camera 10 of theautomatic start of the recording (T53). Note that, when receiving thenotification of the occurrence of the serious incident, the mobileterminal notifies wearable camera 10 of the automatic start of therecording even in a case where a serious criminal's face is alreadyrecognized. When receiving the notification of the automatic start ofthe recording, wearable camera 10 starts the automatic recording (T54).

In Modification example 2, wearable camera 10 is connected to the mobileterminal, and thus is not necessarily connected to the mobile line.Accordingly, as compared with the case of Modification example 1 whichis usually connected to the mobile line, the wearable camera inModification example 2 can reduce the battery drain, and thus can beused for a long time of period.

When back end server 50 receives the emergency information from wearablecamera 10, and notifies command system 90 of the received emergencyinformation, command system 90 may notify wearable camera 10 of theautomatic start of the recording via the mobile terminal.

Although various embodiments have been described with reference to theaccompanying drawings, it is to be understood that the presentdisclosure is not limited thereto. It is obvious that those skilled inthe art can conceive various changes and modifications within the scopedescribed in the claims, and it is understood that the aforementionedvarious changes and modifications naturally belong to the technicalscope of the present disclosure.

For example, in the above-described embodiment, the case where thewearable camera starts the automatic recording when the predeterminedsounds are collected is described; however, the automatic recording maybe started even in other cases in addition to the case where the soundscollected by the microphone correspond to the predetermined sound. Forexample, when the police officer who is charging the wearable camera byusing a charging cable in the patrol car 7 encounters an incident suchas fire or injury, in a case where the police officer rushes out of thepatrol with the wearable camera, that is, in a case where the chargingcable is disconnected from the wearable camera without an operation ofdetaching, the wearable camera may start the automatic recording byregarding the disconnection of the charging cable as a trigger. In thecase of the emergency, the recording is started even when the policeofficer just gets out of the patrol car with the wearable camera so asto rapidly take an action.

In addition, in the above-described embodiment, as one example of amethod of collating the audio data, a method of collating audio dataincluded in the cut-out data transmitted from the wearable camera 10with the audio data registered in audio database 58 z of back end server50, that is a collating method of determining whether or not the itemsof audio data are matched with each other (or similar to each other) asa signal waveform of the audio data is described. However, the method ofcollating the audio data is not limited to the method of determiningwhether or not the items of audio data are matched with each other (orsimilar to each other) as a signal waveform of the audio data. Back endserver 50 may convert the audio data included in the cut-out datatransmitted from wearable camera 10 into text data through the soundrecognition, and then collate whether or not the converted text data ismatched (similar to) with text data corresponding to the audio dataregistered in audio database 58 z. With this, back end server 50 caneasily determine whether or not the audio data included in the cut-outdata transmitted from wearable camera 10 is matched with the audio dataregistered in audio database 58 z by using the text data.

What is claimed is:
 1. A wearable camera system in which a wearable camera which is mounted on or belongs to a police officer is connected to a server, wherein the wearable camera includes a capture that captures a subject; a recorder that records a video of the captured subject; a microphone that collects sounds; a detector that generates audio data by cutting out a section of the sounds collected by the microphone; and a transmitter that transmits the generated audio data to the server, wherein the server includes a storage in which a predetermined audio data obtained during patrol or relating to an incident is registered; a receiver that receives the audio data transmitted from the wearable camera; a collator that collates the received audio data with the predetermined audio data registered in the storage; and a notifier that notifies the wearable camera of an instruction to start recording in a case where the received audio data and the registered predetermined audio data are matched with each other, as a result of collation, and wherein in a case of being notified of the instruction to start the recording from the server, the wearable camera starts the recording of a video of the subject captured by the capture.
 2. The wearable camera system of claim 1, wherein the storage registers audio data of sounds emitted in an emergency situation as the predetermined audio data, wherein the server transmits a distribution instruction of the video to the wearable camera in a case where the received audio data is matched with the registered audio data of the sounds emitted in the emergency situation, and wherein the wearable camera starts the distribution of the video of the subject captured by the capture based on the distribution instruction of the video transmitted from the server.
 3. The wearable camera system of claim 1, wherein the wearable camera includes a button which is operated in the emergency situation, and emergency information is transmitted to the server in a case where the button is operated, wherein the server transmits the distribution instruction of the video to the wearable camera when receiving the emergency information which is transmitted from the wearable camera, and wherein the wearable camera starts the distribution of the video of the subject captured by the capture based on the distribution instruction of the video transmitted from the server.
 4. The wearable camera system of claim 1, wherein a sound obtained during the patrol or relating to the incident, which is collected by the microphone is a sound of gunshot generated during the patrol or in a site of an incident.
 5. A recording control method in the police officer wearable camera system in which a wearable camera which is mounted on or belongs to a police officer is connected to a server, wherein the wearable camera includes a microphone, captures a subject, generates audio data by cutting out a section of sounds collected by the microphone, and transmits the generated audio data to the server, wherein the server stores a predetermined audio data obtained during patrol or relating to an incident in a storage, receives the transmitted audio data from the wearable camera, collates the received audio data with the predetermined audio data registered in the storage, and notifies the wearable camera of an instruction to start recording in a case where the received audio data and the registered predetermined audio data are matched with each other, as a result of collation, and wherein in a case where the notified of the instruction to start the recording is received from the server, the wearable camera starts the recording of a video of the captured subject. 